package com.sfy.sfypicturebackend.service.impl;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.ObjUtil;
import cn.hutool.core.util.StrUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.sfy.sfypicturebackend.common.ErrorCode;
import com.sfy.sfypicturebackend.exception.BusinessException;
import com.sfy.sfypicturebackend.mapper.PictureMapper;
import com.sfy.sfypicturebackend.model.dto.picture.PictureUploadRequest;
import com.sfy.sfypicturebackend.model.dto.user.UserQueryRequest;
import com.sfy.sfypicturebackend.model.entity.Picture;
import com.sfy.sfypicturebackend.model.entity.User;
import com.sfy.sfypicturebackend.model.enums.UserRoleEnum;
import com.sfy.sfypicturebackend.model.vo.picture.PictureVO;
import com.sfy.sfypicturebackend.model.vo.user.LoginUserVO;
import com.sfy.sfypicturebackend.model.vo.user.UserVO;
import com.sfy.sfypicturebackend.service.PictureService;
import com.sfy.sfypicturebackend.service.UserService;
import com.sfy.sfypicturebackend.mapper.UserMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;

import java.util.List;
import java.util.stream.Collectors;

import static com.sfy.sfypicturebackend.constant.UserConstant.USER_LOGIN_STATE;

/**
* @author sfy
* @description 针对表【user(用户)】的数据库操作Service实现
* @createDate 2024-12-18 15:13:21
*/
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User>
    implements UserService{

    final String SALT = "sfy";

    @Override
    public long userRegister(String userAccount, String userPassword, String checkPassword) {
        // 1.校验
        if (StrUtil.hasBlank(userAccount, userPassword, checkPassword)){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"参数为空");
        }
        if (userAccount.length() < 4){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"用户账号过短");
        }
        if (userPassword.length() < 8 || checkPassword.length() < 8){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"用户密码过短");
        }
        if (!userPassword.equals(checkPassword)){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"两次输入密码不一致");
        }
        // 2.查重
        LambdaQueryWrapper<User> queryWrapper = Wrappers.lambdaQuery(User.class)
                .eq(User::getUserAccount, userAccount);
        Long count = this.baseMapper.selectCount(queryWrapper);
        if (count > 0){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"账号重复");
        }
        // 3.加密
        String encryptPassword = DigestUtils.md5DigestAsHex((SALT+userPassword).getBytes());
        // 4.插入数据
        User user = new User();
        user.setUserAccount(userAccount);
        user.setUserPassword(encryptPassword);
        user.setUserName("默认名称");
        user.setUserRole(UserRoleEnum.USER.getValue());
        boolean save = this.save(user);
        if (!save){
            throw new BusinessException(ErrorCode.SYSTEM_ERROR,"注册失败");
        }
        return user.getId();
    }

    @Override
    public LoginUserVO userLogin(String userAccount, String userPassword, HttpServletRequest request) {
        if (StrUtil.hasBlank(userAccount, userPassword)){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"参数为空");
        }
        String encryptPassword = DigestUtils.md5DigestAsHex((SALT+userPassword).getBytes());
        // 查询用户是否存在
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("userAccount", userAccount);
        queryWrapper.eq("userPassword",encryptPassword);
        User user = this.baseMapper.selectOne(queryWrapper);
        if (user == null){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"账号或密码错误");
        }
        // 记录用户的登录态
        request.getSession().setAttribute(USER_LOGIN_STATE,user);
        return this.getLoginUserVO(user);
    }

    @Override
    public LoginUserVO getLoginUserVO(User user) {
        if (user == null) {
            return null;
        }
        LoginUserVO loginUserVO = new LoginUserVO();
        BeanUtils.copyProperties(user, loginUserVO);
        return loginUserVO;
    }

    @Override
    public User getLoginUser(HttpServletRequest request) {
        Object userObj = request.getSession().getAttribute(USER_LOGIN_STATE);
        User currentUser = (User) userObj;
        if (currentUser == null || currentUser.getId() == null){
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        // 从数据库中查询
        Long id = currentUser.getId();
        currentUser = this.getById(id);
        if (currentUser == null){
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        return currentUser;
    }

    @Override
    public boolean userLogout(HttpServletRequest request) {
        // 先判断是否已登录
        Object userObj = request.getSession().getAttribute(USER_LOGIN_STATE);
        if (userObj == null) {
            throw new BusinessException(ErrorCode.OPERATION_ERROR, "未登录");
        }
        // 移除登录态
        request.getSession().removeAttribute(USER_LOGIN_STATE);
        return true;
    }

    @Override
    public UserVO getUserVo(User user) {
        if (user == null){
            return null;
        }
        UserVO userVO = new UserVO();
        BeanUtils.copyProperties(user, userVO);
        return userVO;
    }

    @Override
    public List<UserVO> getUserList(List<User> userList) {
        if (CollUtil.isEmpty(userList)){
            return null;
        }
        return userList.stream().map(this::getUserVo).collect(Collectors.toList());
    }

    @Override
    public QueryWrapper<User> getQueryWrapper(UserQueryRequest userQueryRequest) {
        if (userQueryRequest == null) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "请求参数为空");
        }
        Long id = userQueryRequest.getId();
        String userAccount = userQueryRequest.getUserAccount();
        String userName = userQueryRequest.getUserName();
        String userProfile = userQueryRequest.getUserProfile();
        String userRole = userQueryRequest.getUserRole();
        String sortField = userQueryRequest.getSortField();
        String sortOrder = userQueryRequest.getSortOrder();
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq(ObjUtil.isNotNull(id), "id", id);
        queryWrapper.eq(StrUtil.isNotBlank(userRole), "userRole", userRole);
        queryWrapper.like(StrUtil.isNotBlank(userAccount), "userAccount", userAccount);
        queryWrapper.like(StrUtil.isNotBlank(userName), "userName", userName);
        queryWrapper.like(StrUtil.isNotBlank(userProfile), "userProfile", userProfile);
        queryWrapper.orderBy(StrUtil.isNotEmpty(sortField), sortOrder.equals("ascend"), sortField);
        return queryWrapper;
    }

    @Override
    public String getEncryptPassword(String defaultPassword) {
        return DigestUtils.md5DigestAsHex((SALT+defaultPassword).getBytes());
    }

    @Override
    public boolean isAdmin(User user) {
        return user != null && UserRoleEnum.ADMIN.getValue().equals(user.getUserRole());
    }

}




